<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>GstAudioConverter: GStreamer Base Plugins 1.0 Library Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
<link rel="up" href="gstreamer-audio.html" title="Audio Library">
<link rel="prev" href="gst-plugins-base-libs-Audio-channels.html" title="Audio-channels">
<link rel="next" href="gst-plugins-base-libs-GstAudioQuantize.html" title="GstAudioQuantize">
<meta name="generator" content="GTK-Doc V1.28 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#gst-plugins-base-libs-GstAudioConverter.description" class="shortcut">Description</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="gstreamer-audio.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="gst-plugins-base-libs-Audio-channels.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="gst-plugins-base-libs-GstAudioQuantize.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="gst-plugins-base-libs-GstAudioConverter"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-base-libs-GstAudioConverter.top_of_page"></a>GstAudioConverter</span></h2>
<p>GstAudioConverter — Generic audio conversion</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstAudioConverter.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="returnvalue">GstAudioConverter</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-new" title="gst_audio_converter_new ()">gst_audio_converter_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-free" title="gst_audio_converter_free ()">gst_audio_converter_free</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-samples" title="gst_audio_converter_samples ()">gst_audio_converter_samples</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-convert" title="gst_audio_converter_convert ()">gst_audio_converter_convert</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-get-in-frames" title="gst_audio_converter_get_in_frames ()">gst_audio_converter_get_in_frames</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-get-max-latency" title="gst_audio_converter_get_max_latency ()">gst_audio_converter_get_max_latency</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-get-out-frames" title="gst_audio_converter_get_out_frames ()">gst_audio_converter_get_out_frames</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-update-config" title="gst_audio_converter_update_config ()">gst_audio_converter_update_config</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstStructure.html#GstStructure-struct"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-get-config" title="gst_audio_converter_get_config ()">gst_audio_converter_get_config</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-reset" title="gst_audio_converter_reset ()">gst_audio_converter_reset</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-supports-inplace" title="gst_audio_converter_supports_inplace ()">gst_audio_converter_supports_inplace</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-is-passthrough" title="gst_audio_converter_is_passthrough ()">gst_audio_converter_is_passthrough</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstAudioConverter.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter">GstAudioConverter</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverterFlags" title="enum GstAudioConverterFlags">GstAudioConverterFlags</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GST-AUDIO-CONVERTER-OPT-DITHER-METHOD:CAPS" title="GST_AUDIO_CONVERTER_OPT_DITHER_METHOD">GST_AUDIO_CONVERTER_OPT_DITHER_METHOD</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GST-AUDIO-CONVERTER-OPT-NOISE-SHAPING-METHOD:CAPS" title="GST_AUDIO_CONVERTER_OPT_NOISE_SHAPING_METHOD">GST_AUDIO_CONVERTER_OPT_NOISE_SHAPING_METHOD</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GST-AUDIO-CONVERTER-OPT-QUANTIZATION:CAPS" title="GST_AUDIO_CONVERTER_OPT_QUANTIZATION">GST_AUDIO_CONVERTER_OPT_QUANTIZATION</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GST-AUDIO-CONVERTER-OPT-MIX-MATRIX:CAPS" title="GST_AUDIO_CONVERTER_OPT_MIX_MATRIX">GST_AUDIO_CONVERTER_OPT_MIX_MATRIX</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GST-AUDIO-CONVERTER-OPT-RESAMPLER-METHOD:CAPS" title="GST_AUDIO_CONVERTER_OPT_RESAMPLER_METHOD">GST_AUDIO_CONVERTER_OPT_RESAMPLER_METHOD</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstAudioConverter.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gst/audio/audio.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstAudioConverter.description"></a><h2>Description</h2>
<p>This object is used to convert audio samples from one format to another.
The object can perform conversion of:</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><p>audio format with optional dithering and noise shaping</p></li>
<li class="listitem"><p>audio samplerate</p></li>
<li class="listitem"><p>audio channels and channel layout</p></li>
</ul></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstAudioConverter.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gst-audio-converter-new"></a><h3>gst_audio_converter_new ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="returnvalue">GstAudioConverter</span></a> *
gst_audio_converter_new (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverterFlags" title="enum GstAudioConverterFlags"><span class="type">GstAudioConverterFlags</span></a> flags</code></em>,
                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudio.html#GstAudioInfo"><span class="type">GstAudioInfo</span></a> *in_info</code></em>,
                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudio.html#GstAudioInfo"><span class="type">GstAudioInfo</span></a> *out_info</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstStructure.html#GstStructure-struct"><span class="type">GstStructure</span></a> *config</code></em>);</pre>
<p>Create a new <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> that is able to convert between <em class="parameter"><code>in</code></em>
 and <em class="parameter"><code>out</code></em>

audio formats.</p>
<p><em class="parameter"><code>config</code></em>
 contains extra configuration options, see <span class="type">GST_AUDIO_CONVERTER_OPT_</span>*
parameters for details about the options and values.</p>
<div class="refsect3">
<a name="gst-audio-converter-new.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p>extra <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverterFlags" title="enum GstAudioConverterFlags"><span class="type">GstAudioConverterFlags</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>in_info</p></td>
<td class="parameter_description"><p>a source <a class="link" href="gst-plugins-base-libs-GstAudio.html#GstAudioInfo"><span class="type">GstAudioInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out_info</p></td>
<td class="parameter_description"><p>a destination <a class="link" href="gst-plugins-base-libs-GstAudio.html#GstAudioInfo"><span class="type">GstAudioInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>config</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstStructure.html#GstStructure-struct"><span class="type">GstStructure</span></a> with configuration options. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-audio-converter-new.returns"></a><h4>Returns</h4>
<p> a <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if conversion is not possible.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-converter-free"></a><h3>gst_audio_converter_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_audio_converter_free (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> *convert</code></em>);</pre>
<p>Free a previously allocated <em class="parameter"><code>convert</code></em>
 instance.</p>
<div class="refsect3">
<a name="gst-audio-converter-free.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>convert</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-converter-samples"></a><h3>gst_audio_converter_samples ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_audio_converter_samples (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> *convert</code></em>,
                             <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverterFlags" title="enum GstAudioConverterFlags"><span class="type">GstAudioConverterFlags</span></a> flags</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> in[]</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> in_frames</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> out[]</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> out_frames</code></em>);</pre>
<p>Perform the conversion with <em class="parameter"><code>in_frames</code></em>
 in <em class="parameter"><code>in</code></em>
 to <em class="parameter"><code>out_frames</code></em>
 in <em class="parameter"><code>out</code></em>

using <em class="parameter"><code>convert</code></em>
.</p>
<p>In case the samples are interleaved, <em class="parameter"><code>in</code></em>
 and <em class="parameter"><code>out</code></em>
 must point to an
array with a single element pointing to a block of interleaved samples.</p>
<p>If non-interleaved samples are used, <em class="parameter"><code>in</code></em>
 and <em class="parameter"><code>out</code></em>
 must point to an
array with pointers to memory blocks, one for each channel.</p>
<p><em class="parameter"><code>in</code></em>
 may be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, in which case <em class="parameter"><code>in_frames</code></em>
 of silence samples are processed
by the converter.</p>
<p>This function always produces <em class="parameter"><code>out_frames</code></em>
 of output and consumes <em class="parameter"><code>in_frames</code></em>
 of
input. Use <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-get-out-frames" title="gst_audio_converter_get_out_frames ()"><code class="function">gst_audio_converter_get_out_frames()</code></a> and
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-get-in-frames" title="gst_audio_converter_get_in_frames ()"><code class="function">gst_audio_converter_get_in_frames()</code></a> to make sure <em class="parameter"><code>in_frames</code></em>
 and <em class="parameter"><code>out_frames</code></em>

are matching and <em class="parameter"><code>in</code></em>
 and <em class="parameter"><code>out</code></em>
 point to enough memory.</p>
<div class="refsect3">
<a name="gst-audio-converter-samples.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>convert</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p>extra <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverterFlags" title="enum GstAudioConverterFlags"><span class="type">GstAudioConverterFlags</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>in</p></td>
<td class="parameter_description"><p>input frames</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>in_frames</p></td>
<td class="parameter_description"><p>number of input frames</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out</p></td>
<td class="parameter_description"><p>output frames</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out_frames</p></td>
<td class="parameter_description"><p>number of output frames</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-audio-converter-samples.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> is the conversion could be performed.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-converter-convert"></a><h3>gst_audio_converter_convert ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_audio_converter_convert (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> *convert</code></em>,
                             <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverterFlags" title="enum GstAudioConverterFlags"><span class="type">GstAudioConverterFlags</span></a> flags</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> in</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> in_size</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> *out</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> *out_size</code></em>);</pre>
<p>Convenience wrapper around <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-samples" title="gst_audio_converter_samples ()"><code class="function">gst_audio_converter_samples()</code></a>, which will
perform allocation of the output buffer based on the result from
<a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-get-out-frames" title="gst_audio_converter_get_out_frames ()"><code class="function">gst_audio_converter_get_out_frames()</code></a>.</p>
<div class="refsect3">
<a name="gst-audio-converter-convert.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>convert</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p>extra <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverterFlags" title="enum GstAudioConverterFlags"><span class="type">GstAudioConverterFlags</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>in</p></td>
<td class="parameter_description"><p>input data. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=in_size][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> guint8]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>in_size</p></td>
<td class="parameter_description"><p>size of <em class="parameter"><code>in</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out</p></td>
<td class="parameter_description"><p>a pointer where
the output data will be written. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=out_size][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> guint8]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>out_size</p></td>
<td class="parameter_description"><p>a pointer where the size of <em class="parameter"><code>out</code></em>
will be written. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-audio-converter-convert.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> is the conversion could be performed.</p>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.14">1.14</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-converter-get-in-frames"></a><h3>gst_audio_converter_get_in_frames ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a>
gst_audio_converter_get_in_frames (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> *convert</code></em>,
                                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> out_frames</code></em>);</pre>
<p>Calculate how many input frames are currently needed by <em class="parameter"><code>convert</code></em>
 to produce
<em class="parameter"><code>out_frames</code></em>
 of output frames.</p>
<div class="refsect3">
<a name="gst-audio-converter-get-in-frames.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>convert</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out_frames</p></td>
<td class="parameter_description"><p>number of output frames</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-audio-converter-get-in-frames.returns"></a><h4>Returns</h4>
<p> the number of input frames</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-converter-get-max-latency"></a><h3>gst_audio_converter_get_max_latency ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a>
gst_audio_converter_get_max_latency (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> *convert</code></em>);</pre>
<p>Get the maximum number of input frames that the converter would
need before producing output.</p>
<div class="refsect3">
<a name="gst-audio-converter-get-max-latency.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>convert</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-audio-converter-get-max-latency.returns"></a><h4>Returns</h4>
<p> the latency of <em class="parameter"><code>convert</code></em>
as expressed in the number of
frames.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-converter-get-out-frames"></a><h3>gst_audio_converter_get_out_frames ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a>
gst_audio_converter_get_out_frames (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> *convert</code></em>,
                                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> in_frames</code></em>);</pre>
<p>Calculate how many output frames can be produced when <em class="parameter"><code>in_frames</code></em>
 input
frames are given to <em class="parameter"><code>convert</code></em>
.</p>
<div class="refsect3">
<a name="gst-audio-converter-get-out-frames.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>convert</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>in_frames</p></td>
<td class="parameter_description"><p>number of input frames</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-audio-converter-get-out-frames.returns"></a><h4>Returns</h4>
<p> the number of output frames</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-converter-update-config"></a><h3>gst_audio_converter_update_config ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_audio_converter_update_config (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> *convert</code></em>,
                                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> in_rate</code></em>,
                                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> out_rate</code></em>,
                                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstStructure.html#GstStructure-struct"><span class="type">GstStructure</span></a> *config</code></em>);</pre>
<p>Set <em class="parameter"><code>in_rate</code></em>
, <em class="parameter"><code>out_rate</code></em>
 and <em class="parameter"><code>config</code></em>
 as extra configuration for <em class="parameter"><code>convert</code></em>
.</p>
<p><em class="parameter"><code>in_rate</code></em>
 and <em class="parameter"><code>out_rate</code></em>
 specify the new sample rates of input and output
formats. A value of 0 leaves the sample rate unchanged.</p>
<p><em class="parameter"><code>config</code></em>
 can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, in which case, the current configuration is not
changed.</p>
<p>If the parameters in <em class="parameter"><code>config</code></em>
 can not be set exactly, this function returns
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> and will try to update as much state as possible. The new state can
then be retrieved and refined with <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-get-config" title="gst_audio_converter_get_config ()"><code class="function">gst_audio_converter_get_config()</code></a>.</p>
<p>Look at the <span class="type">GST_AUDIO_CONVERTER_OPT_</span>* fields to check valid configuration
option and values.</p>
<div class="refsect3">
<a name="gst-audio-converter-update-config.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>convert</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>in_rate</p></td>
<td class="parameter_description"><p>input rate</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out_rate</p></td>
<td class="parameter_description"><p>output rate</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>config</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstStructure.html#GstStructure-struct"><span class="type">GstStructure</span></a> or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-audio-converter-update-config.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> when the new parameters could be set</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-converter-get-config"></a><h3>gst_audio_converter_get_config ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstStructure.html#GstStructure-struct"><span class="returnvalue">GstStructure</span></a> *
gst_audio_converter_get_config (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> *convert</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *in_rate</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *out_rate</code></em>);</pre>
<p>Get the current configuration of <em class="parameter"><code>convert</code></em>
.</p>
<div class="refsect3">
<a name="gst-audio-converter-get-config.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>convert</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>in_rate</p></td>
<td class="parameter_description"><p>result input rate. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>out_rate</p></td>
<td class="parameter_description"><p>result output rate. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-audio-converter-get-config.returns"></a><h4>Returns</h4>
<p>a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstStructure.html#GstStructure-struct"><span class="type">GstStructure</span></a> that remains valid for as long as <em class="parameter"><code>convert</code></em>
is valid
or until <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-update-config" title="gst_audio_converter_update_config ()"><code class="function">gst_audio_converter_update_config()</code></a> is called. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-converter-reset"></a><h3>gst_audio_converter_reset ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_audio_converter_reset (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> *convert</code></em>);</pre>
<p>Reset <em class="parameter"><code>convert</code></em>
 to the state it was when it was first created, clearing
any history it might currently have.</p>
<div class="refsect3">
<a name="gst-audio-converter-reset.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>convert</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-converter-supports-inplace"></a><h3>gst_audio_converter_supports_inplace ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_audio_converter_supports_inplace (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> *convert</code></em>);</pre>
<p>Returns whether the audio converter can perform the conversion in-place.
The return value would be typically input to <a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstBaseTransform.html#gst-base-transform-set-in-place"><code class="function">gst_base_transform_set_in_place()</code></a></p>
<div class="refsect3">
<a name="gst-audio-converter-supports-inplace.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>convert</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-audio-converter-supports-inplace.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> when the conversion can be done in place.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-converter-is-passthrough"></a><h3>gst_audio_converter_is_passthrough ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_audio_converter_is_passthrough (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#GstAudioConverter" title="GstAudioConverter"><span class="type">GstAudioConverter</span></a> *convert</code></em>);</pre>
<p>Returns whether the audio converter will operate in passthrough mode.
The return value would be typically input to <a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstBaseTransform.html#gst-base-transform-set-passthrough"><code class="function">gst_base_transform_set_passthrough()</code></a></p>
<div class="refsect3">
<a name="gst-audio-converter-is-passthrough.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> when no conversion will actually occur.</p>
</div>
<p class="since">Since: <a class="link" href="ix03.html#api-index-1.16">1.16</a></p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstAudioConverter.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstAudioConverter"></a><h3>GstAudioConverter</h3>
<pre class="programlisting">typedef struct _GstAudioConverter GstAudioConverter;</pre>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioConverterFlags"></a><h3>enum GstAudioConverterFlags</h3>
<p>Extra flags passed to <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-new" title="gst_audio_converter_new ()"><code class="function">gst_audio_converter_new()</code></a> and <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-samples" title="gst_audio_converter_samples ()"><code class="function">gst_audio_converter_samples()</code></a>.</p>
<div class="refsect3">
<a name="GstAudioConverterFlags.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-AUDIO-CONVERTER-FLAG-NONE:CAPS"></a>GST_AUDIO_CONVERTER_FLAG_NONE</p></td>
<td class="enum_member_description">
<p>no flag</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-AUDIO-CONVERTER-FLAG-IN-WRITABLE:CAPS"></a>GST_AUDIO_CONVERTER_FLAG_IN_WRITABLE</p></td>
<td class="enum_member_description">
<p>the input sample arrays are writable and can be
   used as temporary storage during conversion.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-AUDIO-CONVERTER-FLAG-VARIABLE-RATE:CAPS"></a>GST_AUDIO_CONVERTER_FLAG_VARIABLE_RATE</p></td>
<td class="enum_member_description">
<p>allow arbitrary rate updates with
   <a class="link" href="gst-plugins-base-libs-GstAudioConverter.html#gst-audio-converter-update-config" title="gst_audio_converter_update_config ()"><code class="function">gst_audio_converter_update_config()</code></a>.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-AUDIO-CONVERTER-OPT-DITHER-METHOD:CAPS"></a><h3>GST_AUDIO_CONVERTER_OPT_DITHER_METHOD</h3>
<pre class="programlisting">#define GST_AUDIO_CONVERTER_OPT_DITHER_METHOD   "GstAudioConverter.dither-method"
</pre>
<p><span class="type">GST_TYPE_AUDIO_DITHER_METHOD</span>, The dither method to use when
changing bit depth.
Default is <a class="link" href="gst-plugins-base-libs-GstAudioQuantize.html#GST-AUDIO-DITHER-NONE:CAPS"><span class="type">GST_AUDIO_DITHER_NONE</span></a>.</p>
</div>
<hr>
<div class="refsect2">
<a name="GST-AUDIO-CONVERTER-OPT-NOISE-SHAPING-METHOD:CAPS"></a><h3>GST_AUDIO_CONVERTER_OPT_NOISE_SHAPING_METHOD</h3>
<pre class="programlisting">#define GST_AUDIO_CONVERTER_OPT_NOISE_SHAPING_METHOD   "GstAudioConverter.noise-shaping-method"
</pre>
<p><span class="type">GST_TYPE_AUDIO_NOISE_SHAPING_METHOD</span>, The noise shaping method to use
to mask noise from quantization errors.
Default is <a class="link" href="gst-plugins-base-libs-GstAudioQuantize.html#GST-AUDIO-NOISE-SHAPING-NONE:CAPS"><span class="type">GST_AUDIO_NOISE_SHAPING_NONE</span></a>.</p>
</div>
<hr>
<div class="refsect2">
<a name="GST-AUDIO-CONVERTER-OPT-QUANTIZATION:CAPS"></a><h3>GST_AUDIO_CONVERTER_OPT_QUANTIZATION</h3>
<pre class="programlisting">#define GST_AUDIO_CONVERTER_OPT_QUANTIZATION   "GstAudioConverter.quantization"
</pre>
<p><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#G-TYPE-UINT:CAPS"><span class="type">G_TYPE_UINT</span></a>, The quantization amount. Components will be
quantized to multiples of this value.
Default is 1</p>
</div>
<hr>
<div class="refsect2">
<a name="GST-AUDIO-CONVERTER-OPT-MIX-MATRIX:CAPS"></a><h3>GST_AUDIO_CONVERTER_OPT_MIX_MATRIX</h3>
<pre class="programlisting">#define GST_AUDIO_CONVERTER_OPT_MIX_MATRIX   "GstAudioConverter.mix-matrix"
</pre>
<p><span class="type">GST_TYPE_VALUE_LIST</span>, The channel mapping matrix.</p>
<p>The matrix coefficients must be between -1 and 1: the number of rows is equal
to the number of output channels and the number of columns is equal to the
number of input channels.</p>
<div class="refsect3">
<a name="id-1.2.6.16.8.7.6"></a><h4>Example matrix generation code</h4>
<p>To generate the matrix using code:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16</pre></td>
        <td class="listing_code"><pre class="programlisting">GValue v <span class="gtkdoc opt">=</span> G_VALUE_INIT<span class="gtkdoc opt">;</span>
GValue v2 <span class="gtkdoc opt">=</span> G_VALUE_INIT<span class="gtkdoc opt">;</span>
GValue v3 <span class="gtkdoc opt">=</span> G_VALUE_INIT<span class="gtkdoc opt">;</span>

<span class="function"><a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#g-value-init">g_value_init</a></span> <span class="gtkdoc opt">(&amp;</span>v2<span class="gtkdoc opt">,</span> GST_TYPE_ARRAY<span class="gtkdoc opt">);</span>
<span class="function"><a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#g-value-init">g_value_init</a></span> <span class="gtkdoc opt">(&amp;</span>v3<span class="gtkdoc opt">,</span> G_TYPE_DOUBLE<span class="gtkdoc opt">);</span>
<span class="function"><a href="/usr/share/gtk-doc/html/gobject/gobject-Standard-Parameter-and-Value-Types.html#g-value-set-double">g_value_set_double</a></span> <span class="gtkdoc opt">(&amp;</span>v3<span class="gtkdoc opt">,</span> <span class="number">1</span><span class="gtkdoc opt">);</span>
<span class="function"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstValue.html#gst-value-array-append-value">gst_value_array_append_value</a></span> <span class="gtkdoc opt">(&amp;</span>v2<span class="gtkdoc opt">, &amp;</span>v3<span class="gtkdoc opt">);</span>
<span class="function"><a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#g-value-unset">g_value_unset</a></span> <span class="gtkdoc opt">(&amp;</span>v3<span class="gtkdoc opt">);</span>
<span class="gtkdoc opt">[</span> Repeat <span class="keyword">for</span> as many <span class="gtkdoc kwb">double</span> as your input channels <span class="gtkdoc opt">-</span> unset <span class="keyword">and</span> reinit v3 <span class="gtkdoc opt">]</span>
<span class="function"><a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#g-value-init">g_value_init</a></span> <span class="gtkdoc opt">(&amp;</span>v<span class="gtkdoc opt">,</span> GST_TYPE_ARRAY<span class="gtkdoc opt">);</span>
<span class="function"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstValue.html#gst-value-array-append-value">gst_value_array_append_value</a></span> <span class="gtkdoc opt">(&amp;</span>v<span class="gtkdoc opt">, &amp;</span>v2<span class="gtkdoc opt">);</span>
<span class="function"><a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#g-value-unset">g_value_unset</a></span> <span class="gtkdoc opt">(&amp;</span>v2<span class="gtkdoc opt">);</span>
<span class="gtkdoc opt">[</span> Repeat <span class="keyword">for</span> as many v2<span class="string">&apos;s as your output channels - unset and reinit v2]</span>
<span class="string">g_object_set_property (G_OBJECT (audiomixmatrix), &quot;matrix&quot;, &amp;v);</span>
<span class="string">g_value_unset (&amp;v);</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-AUDIO-CONVERTER-OPT-RESAMPLER-METHOD:CAPS"></a><h3>GST_AUDIO_CONVERTER_OPT_RESAMPLER_METHOD</h3>
<pre class="programlisting">#define GST_AUDIO_CONVERTER_OPT_RESAMPLER_METHOD   "GstAudioConverter.resampler-method"
</pre>
<p><span class="type">GST_TYPE_AUDIO_RESAMPLER_METHOD</span>, The resampler method to use when
changing sample rates.
Default is <a class="link" href="gst-plugins-base-libs-GstAudio.html#GST-AUDIO-RESAMPLER-METHOD-BLACKMAN-NUTTALL:CAPS"><span class="type">GST_AUDIO_RESAMPLER_METHOD_BLACKMAN_NUTTALL</span></a>.</p>
</div>
</div>
</div>
<div class="footer">
<hr>Generated by GTK-Doc V1.28</div>
</body>
</html>